Seiko Cal. 0728 - 641

The 0728-641 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 0728 caliber with 26j jewels beating at 36,000 bph, it delivers a 40 hours power reserve. [seikata-wm-03beda2bf0a7]

Also known as: Tuna, Flighty

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

39mm

Case Thickness

10.7mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Black

Jewels

26j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1982

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